Telectronics N.v.

Pacesetter, Inc.

James C Hansen

Tibor A Nappholz

Robert H Whigham

John R Hamilton

A rate responsive pacemaker generates an initial histogram of a rate control parameter. The histogram is then normalized to conform to preselected characteristics. For example. By linearizing a portion of the histogram. The new histogram is used to map the parameter into a corresponding pacing rate.

Pacemaker with improved distributed rate pacing

A rate-responsive pacemaker whose rate control parameter is minute volume derived over a bipolar lead. An algorithm based on averaged samples and zero crossings provides enhanced accuracy. Sustained exercise at high pacing rates is possible.

Minute volume rate-responsive pacemaker

A rate-responsive heart pacer in which rate-control parameter (RCP) values are arranged in a percentile ranking and mapped onto a percentile ranking of a desired rate distribution. By monitoring the RCP values over an extended time interval and developing a corresponding percentile ranking, the pacemaker automatically self-adapts to long-term changes in RCP measurements and insures that the desired rate distribution is obtained.

Rate-responsive, distributed-rate pacemaker

A rate-responsive heart pacer in which rate-control parameter (RCP) values are arranged in a percentile ranking and mapped into a percentile ranking of a desired rate distribution. By monitoring the RCP values over an extended time interval and developing a corresponding percentile ranking, the pacemaker automatically self-adapts to long-term changes in RCP measurements and insures that the desired rate distribution is obtained.

An implantable pacemaker which stores in memory the representation of an ECG signal by compressing the data. Whenever the input signal changes by a threshold amount from the last time data was recorded, a representation of the time interval which has elapsed is recorded. In a maximimally efficient system, the only information which must be stored are the successive elapsed times, along with indications of when the input signal changes slope.

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Denver, CO, United States of America

James C Hansen